The first signs of a sunburn may not appear for a few hours. The full effect to your skin may not appear for 24 hours or longer. Possible symptoms include:

• Red, tender skin that is warm to touch.
• Blisters that develop hours to days later.
• Severe reactions (sometimes called "sun poisoning"), including fever, chills, nausea, or rash.
• Skin peeling on sunburned areas several days after the sunburn.